Can't help with the Prima Luna, but I have a moddedJolida 3205 Sig (302/502) from Response Audio, and hadit here with a bone stock 302B and it is in anotherclass than the stocker. Much more transparent, betterbass...smoother etc...They are great values stock, but much much bettermodified. It is very close to a CJ CAV 50 I once owned.That is another very musical amp, and worth considerationin that ball park, although will cost a little moreeven used.